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So while a dictionary is an example of a tertiary source, an ancient dictionary is actually a primary source—for the meanings of words in the ancient world. There are no quaternary sources: Either the source is primary, or it describes, comments on, or analyzes primary sources (in which case, it is secondary), or it relies heavily or entirely ...
This wall painting found in the Roman city of Pompeii is an example of a primary source about people in Pompeii in Roman times (portrait of Terentius Neo).. In the study of history as an academic discipline, a primary source (also called an original source) is an artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time ...
A tertiary source is an index or textual consolidation of already published primary and secondary sources [6] that does not provide additional interpretations or analysis of the sources. [7] [8] Some tertiary sources can be used as an aid to find key (seminal) sources, key terms, general common knowledge [9] and established mainstream science on a
Sources of information are commonly categorized as primary, secondary, or tertiary sources.In brief, a primary source is one close to the event with firsthand knowledge (for example, an eyewitness); a secondary source is at least one step removed (for example, a book about an event written by someone not involved in it); and a tertiary source is an encyclopaedia or textbook that provides a ...
One dictionary or glossary may be considered a primary source among linguists, whereas for Wikipedia's purposes it is a secondary source. Another dictionary or glossary that among linguists is considered derivative, and thus secondary, is likely considered a tertiary source for Wikipedia's purposes. Additionally, some glossaries are considered ...
Primary sources usually have some immediate connection or contact with the source of the new idea, thought, or data. For example, the primary source of some experimental data might be written by the scientist who performed the experiments. The primary source of a quotation might be written by someone who was present when the thing was said.
According to Wikipedia's verifiability policy, any material that is challenged or likely to be challenged must be accompanied by a reliable source.In general, the most reliable sources are (a) peer-reviewed journals and books published in university presses, followed by (b) university-level textbooks; then by (c) magazines, journals, and books published by respected publishing houses; then by ...
Any source is a primary source with regard to the Wikipedia article having that source as main topic (see above #Sources in articles about themselves). A summary of the content (or the "plot") of such primary source can of course be based on that "primary" source itself.